20 Most Recent Bunn-O-Matic Coffee Brewer GRW8 - Page 9 Questions & Answers


Please provide model number.

Bunn Coffee... | Answered on Nov 23, 2014


The leak is most likely between the water reservoir and the tank. Bunn uses a soft silicone seal for that connection that gets compressed over time and starts to leak water whenever you make a pot of coffee.

It's planned obsolescence. Bunn won't sell you a new seal. So you have to improvise. But it's simple enough to do.

Remove the top cover and the plastic water reservoir right below it. Don't tamper with the little valve that opens when you close the lid.

Look for the seal. It could be stuck to the bottom of the reservoir, or sitting loosely on top of the metal tank. Make sure to preserve its top-to-bottom orientation (don't put it back in upside down).

Apply a narrow bead of clear silicone into the grooved side of the seal. Press the seal gently onto the reservoir, then apply a thin layer to the smooth side.

Re-install the reservoir and reassemble the unit.

Bunn Coffee... | Answered on Nov 23, 2014


Change the in line water filter on the unit.

Unit may also need descaling.

Bunn Coffee... | Answered on Nov 12, 2014


If it is faulty return it to the place of purchase.

Bunn Coffee... | Answered on Aug 03, 2014


Sounds like the tube feeding water from the reservoir to the spout is clogged. There is a spring Bunn supplies with the coffee maker that you need to use.
Twist loose the plastic piece above where the coffee filter basket is and remove it. Then push the spring as far as you can into the line. Sometimes you have to push a little hard but when you push it in make sure you leave an inch or so still sticking out so you can grasp it to pull it back out. Repeat this a few times to make sure the line is clear of any build-up.
Another idea is to remove the plastic top of the machine by removing the 4 screws and see if the hole where the water drains into is clogged or won't open. Hope this helps.

Bunn Coffee... | Answered on Jul 22, 2014


Some of the coffee makers doesn't come with that feature.

Bunn Coffee... | Answered on Jun 29, 2014


Check another outlet. Otherwise, the heater unit may have shorted out and melted a fusible link inside the coffee maker

Bunn Coffee... | Answered on May 08, 2014


This could be the coffee powder absorbing water. Try running a brew with no coffee powder. If the level is correct you know the powder is absorbing the water. If not it's likely being list via steam/evaporation and/or a leak.

Bunn Coffee... | Answered on May 07, 2014


Remove and clean your filter screen on the back of the unit then replace it. This should be done every month.

Bunn Coffee... | Answered on Mar 24, 2014


Most likely it is scale on the lvl sensor, what model is the unit? Also, do not use viniger on plumbed units, you will almost never get good coffee out of it unless you pop the tank lid and drain the tank.

Bunn Coffee... | Answered on Mar 24, 2014


You can normally find a coffee pot cleaner in your local big box store (Walmart?) if not try running a cycle using vinegar rather than water. If that does not clear it out try unplugging the machine and using a bottle brush in the tank then turning it over the sink to dump out the slime. Be careful not to get water all over any of the electronics.

Bunn Coffee... | Answered on Nov 25, 2013


Can you advise the model number? Most Bunn machines use a faucetwith a rubber membrane inside which is difficult to repair. Its simpler for the owner to replace the faucet with a new Bunn item. If I know the model I may be able to give you the part number you need

Bunn Coffee... | Answered on Nov 01, 2013


check spray head as they get deposit build-up in holes (they unscrew) and while head is off run some water thru machine. never use vinegar or any chemical cleaner inside bunn coffee brewers

Bunn Coffee... | Answered on Mar 08, 2013

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